The displacement of a particle varies according to the relation `y = 4(cos pi t + sin pi t)`. The amplitude of the particle is

The displacement of a particle varies according to the relation x=4 (cos pit+ sinpit) . The amplitude of the particle is.

The displacement of a particle varies according to relation x=4[cos pi t + sin pi t ] . The amplitude of the particle is

The displacement of a particle in S.H.M. varies according to the relation x= 4 (cos pi t +sin pi t ) . The amplitude of the particle is